Pipeline protection device in pull-back stage of directional drilling construction and use method of pipeline protection device

Abstract

The invention discloses a directional drilling construction pull-back stage pipeline protection device and a using method thereof, and relates to the field of directional drilling construction, the directional drilling construction pull-back stage pipeline protection device comprises a pipeline main body, a first ring body is installed on the outer surface of one end of the pipeline main body, and a second ring body is arranged on one side of the first ring body. According to the device, control force is accurately transmitted to the rotating frame through close fit of the two protruding blocks and the control rod, the whole system is driven to synchronously run, the rotating frame drives the three first movable sleeves to synchronously rotate, a transmission rod and an extrusion wheel are further driven, accurate locking and supporting of a pipeline are achieved, extra protection is provided through the design of a fixing ring and a ball, and the device is convenient to use. Particularly, during external force collision, the ball preferentially absorbs impact force and relieves pressure on the pipeline body, so that the damage risk is reduced, the durability of the device is improved, the service life of the device is prolonged, the accuracy and stability of the pulling-back process are improved through the overall design, and high efficiency and reliability of the device in long-term use are guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of directional drilling construction, and in particular to a pipeline protection device in the pull-back stage of directional drilling construction and a use method thereof. Background Art

[0002] Directional drilling is a pipeline construction technology in the engineering technology industry. It is generally used in the construction of oil, natural gas and some municipal pipelines. Large directional drilling rigs are used to perform positioning drilling, hole expansion, hole cleaning, pipeline backhaul and other processes before pipeline construction.

[0003] However, in the prior art, in directional drilling construction, the back-pulling stage is to pull the laid pipe back to the ground from the borehole. However, if the drilling rig back-pulling speed is too fast or the force is too great, the pipe will be subjected to excessive tension, which may cause damage or deformation of the pipe. In addition, the friction and collision between the pipe and the surrounding soil, rocks or other obstacles during the back-pulling process may also destroy the protective layer on the surface of the pipe, thereby causing damage to the pipe. Summary of the invention

[0004] The purpose of the present invention is to provide a pipeline protection device and a method of use during the pull-back stage of directional drilling construction, so as to solve the problem raised in the above background technology that if the drilling rig pulls back too fast or with too much force, the pipeline will be subjected to excessive tension, which may cause damage or deformation of the pipeline.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solutions: a pipeline protection device for the pull-back stage of directional drilling construction, comprising a pipeline body, a first ring body is installed on the outer surface of one end of the pipeline body, a second ring body is arranged on one side of the first ring body, a plurality of buffers are installed between the first ring body and the second ring body, two protection mechanisms are symmetrically arranged on the top of the pipeline body, a driving mechanism is installed between the two protection mechanisms, and a connecting mechanism is installed on one side of the first ring body;

[0006] The protection mechanism comprises a support frame, one side of the support frame is rotatably connected to a rotating frame, the inner side of the rotating frame is rotatably connected to three first movable sleeves, the inner side of the first movable sleeve is slidably connected to a transmission rod, one end of the transmission rod is rotatably connected to a support block, and the inner side of the other end of the transmission rod is rotatably connected to an extrusion wheel, an arc-shaped hole is opened on the top of the support frame, and a protrusion is fixedly connected to the top of the rotating frame;

[0007] The driving mechanism includes a connecting rod and a control rod, the outer surfaces of both ends of the connecting rod are slidably connected with a second movable sleeve, and the outer surface of the connecting rod is rotatably connected with a first hydraulic cylinder, one end of the first hydraulic cylinder is rotatably connected to the control rod, the control rod passes through an arc hole, and the control rod is plugged into a protrusion, nuts are provided on both sides of the protrusion, and the arc hole is slidably connected to the control rod.

[0008] Preferably, one end of the second movable sleeve is fixedly connected to the side wall of the support frame, the bottom of the support frame is rotatably connected to a caster, and the support block is fixedly connected to the side wall of the support frame.

[0009] Preferably, a fixing ring is fixedly connected to an outer edge of one side of the support frame, a plurality of grooves are arranged on the outer side of the fixing ring, and spheres are arranged inside the grooves.

[0010] Preferably, a movable rod is fixedly connected to the bottom of the sphere, the bottom end of the movable rod passes through a fixing ring, and a baffle is fixedly connected to the bottom end of the movable rod, a plurality of first springs are arranged on the inner side of the fixing ring, and the first springs are sleeved on the outer surface of the movable rod.

[0011] Preferably, the connecting mechanism includes a sleeve, both sides of the sleeve are fixedly connected to a connecting frame, one side of the connecting frame is provided with a second hydraulic cylinder, the second hydraulic cylinder is fixedly installed on the surface of the first ring body, and one end of the second hydraulic cylinder is fixedly connected to an extrusion block.

[0012] Preferably, a center rod is fixedly connected to the inner side of the sleeve, a movable plate is rotatably connected to the surface of the center rod, and a control block is fixedly connected to one end of the movable plate.

[0013] Preferably, a locking rod is inserted into one side of the sleeve, one end of the locking rod is inserted into the control block, and one end of the locking rod extends to the inner side of the sleeve.

[0014] Preferably, an installation groove is provided on the outer surface of the sleeve, a second spring is installed inside the installation groove, and one end of the second spring abuts against the movable plate.

[0015] Preferably, the buffer component includes a damper, both ends of the damper are fixedly connected with movable blocks, a third spring is arranged between the two movable blocks, the third spring is sleeved on the outer surface of the damper, one end of the two movable blocks are movably connected with fixed blocks, one of the fixed blocks is fixedly connected to the second ring body, and the other fixed block is fixedly connected to the first ring body.

[0016] A method for using a pipeline protection device in a pull-back phase of directional drilling construction comprises the following steps:

[0017] Step 1: The control rod drives the rotating frame to move. The first hydraulic cylinder drives the control rod to move, driving the two protrusions to transmit force to the rotating frame. The rotating frame rotates and drives the three first movable sleeves to move. With the movement of the first movable sleeves, the transmission rod rotates and locks the pipeline body.

[0018] Step 2: fixed ring protection and collision buffering: during the back-pulling process, the fixed ring protects the system, and when the ball encounters a collision, the movable rod drives the first spring to cooperate to buffer the impact force;

[0019] Step 3: The second hydraulic cylinder pushes the extrusion block to position with the pipeline. The second hydraulic cylinder pushes the extrusion block to compress the second spring, so that the movable plate rotates and drives the locking rod to disengage from the sleeve. When the pipeline body is installed, the second hydraulic cylinder is reset, and the second spring pushes the locking rod to reposition the pipeline body.

[0020] Step 4: Buffering and shock absorption: when the second ring body is connected to the drill bit, the third spring of the buffer member provides buffering to absorb shock and vibration.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. In the present invention, the control force is accurately transmitted to the rotating frame through the close cooperation between the two protrusions and the control rod, driving the synchronous operation of the entire system. The rotating frame drives the three first movable sleeves to rotate synchronously, further driving the transmission rod and the extrusion wheel to achieve accurate locking and support of the pipeline. The design of the fixed ring and the sphere provides additional protection. Especially when there is an external force collision, the sphere preferentially absorbs the impact force and relieves the pressure on the pipeline body, thereby reducing the risk of damage, improving the durability and service life of the device, and the overall design improves the accuracy and stability of the back-pulling process, ensuring the efficiency and reliability of the equipment in long-term use.

[0023] 2. In the present invention, the second hydraulic cylinder applies a force by pushing the extrusion block to rotate the movable plate and compress the second spring. During this process, the control block and the locking rod are linked to release the restriction of the inner cavity of the casing, creating space for the installation of the pipeline body. When the pipeline body is inserted and reaches the predetermined position, the hydraulic system operates in reverse, the extrusion block is reset, and the released elastic energy pushes the movable plate to swing in the opposite direction. The control block drives the locking rod to closely contact the outer wall of the pipeline body to achieve precise extrusion positioning. This design effectively prevents the pipeline body from shifting due to external force or vibration, ensures high stability and positioning accuracy during installation, and improves the reliability and durability of the entire system.

[0024] 3. In the present invention, the buffer utilizes the cooperation of the third spring and the damper to gradually absorb and transform the impact energy when impact or vibration occurs, thereby reducing damage to key components. The expansion and contraction of the third spring combined with the compression of the damper form a powerful energy mitigation mechanism to protect the overall structure of the device. At the same time, the flexible sliding of the movable block enables the buffer to adjust its position and angle under impact forces in different directions, ensuring that the device remains stable when subjected to multi-directional forces. The four evenly distributed buffers effectively disperse external forces, reduce wear and extend the service life of the equipment. It is particularly suitable for complex working conditions and long-term operation, thereby improving the reliability and adaptability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of a pipeline protection device in the pull-back stage of directional drilling construction according to the present invention;

[0026] Figure 2 It is a structural schematic diagram of a protection mechanism and a driving mechanism of a pipeline protection device in the pull-back stage of directional drilling construction according to the present invention;

[0027] Figure 3 It is a structural schematic diagram of a protection mechanism of a pipeline protection device in the pull-back stage of directional drilling construction according to the present invention;

[0028] Figure 4 It is a partial structural schematic diagram of a protection mechanism of a pipeline protection device in the pull-back stage of directional drilling construction according to the present invention;

[0029] Figure 5 It is a structural schematic diagram of a buffer and a connecting mechanism of a pipeline protection device in the pull-back stage of directional drilling construction according to the present invention;

[0030] Figure 6 It is a schematic diagram of the disassembled structure of a connection mechanism of a pipeline protection device in the pull-back stage of a directional drilling construction according to the present invention;

[0031] Figure 7 The present invention is a structural schematic diagram of a connection mechanism of a pipeline protection device in the pull-back stage of directional drilling construction.

[0032] In the figure: 1, pipeline body; 2, protection mechanism; 21, support frame; 211, arc hole; 22, caster; 23, fixing ring; 231, groove; 232, ball; 233, baffle; 234, movable rod; 24, first spring; 25, rotating frame; 251, convex block; 26, transmission rod; 27, first movable sleeve; 28, support block; 29, extrusion wheel; 3, driving mechanism; 31, connecting rod; 32, first hydraulic cylinder; 3 3. Control rod; 34. Second movable sleeve; 35. Nut; 4. First ring body; 5. Connecting mechanism; 51. Second hydraulic cylinder; 511. Extrusion block; 52. Sleeve; 53. Connecting frame; 54. Movable plate; 541. Center rod; 55. Locking rod; 56. Control block; 57. Second spring; 58. Mounting groove; 6. Second ring body; 7. Buffer; 71. Fixed block; 72. Damper; 73. Third spring; 74. Movable block. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the implementation regulations described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] Example 1: Reference Figure 1-7As shown: a pipeline protection device for the pull-back stage of directional drilling construction, comprising a pipeline body 1, a first ring body 4 is installed on the outer surface of one end of the pipeline body 1, a second ring body 6 is arranged on one side of the first ring body 4, a plurality of buffers 7 are installed between the first ring body 4 and the second ring body 6, two protection mechanisms 2 are symmetrically arranged on the top of the pipeline body 1, a driving mechanism 3 is installed between the two protection mechanisms 2, and a connecting mechanism 5 is installed on one side of the first ring body 4;

[0035] The protection mechanism 2 includes a support frame 21, one side of the support frame 21 is rotatably connected to a rotating frame 25, the inner side of the rotating frame 25 is rotatably connected to three first movable sleeves 27, the inner side of the first movable sleeve 27 is slidably connected to a transmission rod 26, one end of the transmission rod 26 is rotatably connected to a support block 28, and the inner side of the other end of the transmission rod 26 is rotatably connected to an extrusion wheel 29, an arc-shaped hole 211 is opened on the top of the support frame 21, and a protrusion 251 is fixedly connected to the top of the rotating frame 25;

[0036] The driving mechanism 3 includes a connecting rod 31 and a control rod 33. The outer surfaces of both ends of the connecting rod 31 are slidably connected with the second movable sleeve 34, and the outer surface of the connecting rod 31 is rotatably connected with the first hydraulic cylinder 32. One end of the first hydraulic cylinder 32 is rotatably connected to the control rod 33. The control rod 33 passes through the arc hole 211, and the control rod 33 is plugged into the protrusion 251. Nuts 35 are provided on both sides of the protrusion 251. The arc hole 211 is slidably connected to the control rod 33.

[0037] In this embodiment, the two protrusions 251 are closely matched with the control rod 33, and the force applied by the control rod 33 is accurately transmitted to the rotating frame 25. As the rotating frame 25 rotates, it is not only an independently moving component, but also has the task of driving the entire system. The rotation of the rotating frame 25 directly drives the synchronous rotation of the three first movable sleeves 27, and this synchronization ensures the coordination and accuracy of subsequent actions.

[0038] When the three first movable sleeves 27 start to move with the movement of the rotating frame 25, they further drive the connected transmission rod 26. During the movement of the transmission rod 26, the support block 28 is used as the rotation center. Through the synchronous movement of the three transmission rods 26, the three extrusion wheels 29 are driven and begin to apply force, gradually forming a wrap-around locking on the pipeline body 1. This locking mechanism not only ensures the positioning accuracy of the pipeline body 1, but also provides strong support for the subsequent back-pulling process, effectively preventing the pipeline from being offset or loosened during the back-pulling process.

[0039] In order to further protect the integrity of the device and the pipeline body 1 during the backhauling process, the design of the fixing ring 23 plays an important role. The fixing ring 23 can provide a solid external protective barrier for the entire structure, especially in a complex backhauling environment. When the ball 232 is hit by an external force, it will respond quickly and drive the movable rod 234 to move accordingly. The movement of the movable rod 234 is closely matched with the first spring 24, and the spring plays a buffering role in this process, thereby reducing the impact of the external force directly acting on the ball 232 and the pipeline body 1.

[0040] In addition, the special design of the sphere 232 enables it to respond to external collisions first. When a collision occurs, the sphere 232 first contacts external obstacles, and its function is equivalent to a primary buffer. Under the buffering effect of the sphere 232, the force distribution of the entire device is more uniform, further protecting the internal active rod 234, the transmission rod 26 and the pipeline body 1. This design not only improves the durability and reliability of the device during the backhaul process, but also significantly reduces the risk of damage caused by collisions, thereby extending the service life of the device.

[0041] Embodiment 2: Figure 2 , Figure 6 and Figure 7 As shown, one end of the second movable sleeve 34 is fixedly connected to the side wall of the support frame 21, the bottom of the support frame 21 is rotatably connected to the caster 22, and the support block 28 is fixedly connected to the side wall of the support frame 21. A fixed ring 23 is fixedly connected to the outer edge of one side of the support frame 21, and a plurality of grooves 231 are arranged on the outer side of the fixed ring 23, and a ball 232 is arranged inside the groove 231. A movable rod 234 is fixedly connected to the bottom of the ball 232, and the bottom end of the movable rod 234 passes through the fixed ring 23, and a baffle 233 is fixedly connected to the bottom end of the movable rod 234. A plurality of first springs 24 are arranged on the inner side of the fixed ring 23, and the first spring 24 is sleeved on the outer surface of the movable rod 234. The connecting mechanism 5 includes a sleeve 52, and both sides of the sleeve 52 are fixedly connected to the connecting frame 53, and one side of the connecting frame 53 is provided with a second hydraulic cylinder 51, and the second hydraulic cylinder 51 is fixedly installed on the surface of the first ring body 4, and one end of the second hydraulic cylinder 51 is fixedly connected to the extrusion block 511. A central rod 541 is fixedly connected to the inner side of the sleeve 52, and a movable plate 54 is rotatably connected to the surface of the central rod 541, and a control block 56 is fixedly connected to one end of the movable plate 54. A locking rod 55 is plugged into one side of the sleeve 52, and one end of the locking rod 55 is plugged into the control block 56, and one end of the locking rod 55 extends to the inner side of the sleeve 52. An installation groove 58 is provided on the outer surface of the sleeve 52, and a second spring 57 is installed inside the installation groove 58, and one end of the second spring 57 abuts against the movable plate 54.

[0042] In this embodiment, during the installation and positioning of the pipeline, the second hydraulic cylinder 51 realizes the key action by pushing the extrusion block 511. Specifically, after the second hydraulic cylinder 51 is started, the extrusion block 511 applies a force to the movable plate 54. Under the continuous push of the extrusion block 511, the movable plate 54 is subjected to the extrusion force and gradually compresses the second spring 57, and completes a certain angle of rotation with the center rod 541 as the rotation axis. In this process, the control block 56 at the other end of the movable plate 54 starts to link the locking rod 55, causing one end of the locking rod 55 to be separated from the inner cavity of the sleeve 52, and reserve space for the subsequent installation of the pipeline body 1.

[0043] When the pipe body 1 is correctly inserted into the sleeve 52 and reaches the designed position, the extrusion block 511 can be driven to gradually reset by controlling the second hydraulic cylinder 51. At this time, the elastic energy stored in the second spring 57 due to compression begins to be released, pushing the movable plate 54 to swing in the opposite direction. During the swinging of the movable plate 54, the control block 56 drives one end of the locking rod 55 to gradually enter the sleeve 52 and apply pressure to the outer wall of the pipe body 1. Through this action, the end of the locking rod 55 is in close contact with the pipe body 1, thereby completing the extrusion positioning of the pipe body 1. This positioning method can not only provide reliable support, but also effectively prevent the pipe body 1 from being offset due to external force or vibration, ensuring the stability and accuracy of the installation.

[0044] Embodiment 3: According to Figure 5 As shown, the buffer member 7 includes a damper 72, both ends of the damper 72 are fixedly connected with movable blocks 74, a third spring 73 is arranged between the two movable blocks 74, the third spring 73 is sleeved on the outer surface of the damper 72, and one end of the two movable blocks 74 is movably connected with a fixed block 71, one of the fixed blocks 71 is fixedly connected to the second ring body 6, and the other fixed block 71 is fixedly connected to the first ring body 4.

[0045] In this embodiment, when the second ring body 6 is connected to the drill bit, the buffer 7 can play an auxiliary buffering role to improve the impact resistance and overall stability of the device. When encountering impact or vibration, the third spring 73 between the two fixed blocks 71 will begin to expand and contract, and gradually absorb and convert the impact energy into elastic potential energy by squeezing the damper 72. In this process, the damper 72 will accumulate a certain amount of energy due to the compression effect, which cooperates with the damping force provided by the third spring 73 to achieve gradual relief of the impact force, thereby protecting related components from damage.

[0046] In addition, the movable block 74 can slide flexibly inside the fixed block 71, thereby adjusting the position and angle of the buffer 7 within a certain range to adapt to impact forces and vibrations in different directions. The four buffers 7 are evenly distributed, which can fully disperse the external forces at various angles, so that the entire device can maintain stable operation under multi-directional forces. At the same time, this design improves the adaptability and reliability of the buffer device, which can not only effectively reduce the wear caused by impact and vibration, but also extend the service life of the device, and is particularly suitable for long-term use under complex working conditions.

[0047] Embodiment 4: A method for using a pipeline protection device in the pull-back phase of directional drilling construction, comprising the following steps:

[0048] 1) The control rod 33 drives the rotating frame 25 to move, and the first hydraulic cylinder 32 drives the control rod 33 to move, driving the two protrusions 251 to transmit force to the rotating frame 25, and the rotating frame 25 rotates and drives the three first movable sleeves 27 to move. With the movement of the first movable sleeves 27, the transmission rod 26 rotates and locks the pipeline body 1;

[0049] 2) The fixed ring 23 protects and buffers collisions. During the back-pulling process, the fixed ring 23 protects the system. When the ball 232 encounters a collision, it drives the movable rod 234 to cooperate with the first spring 24 to buffer the impact force.

[0050] 3) The second hydraulic cylinder 51 pushes the extrusion block 511 to position with the pipeline. The second hydraulic cylinder 51 pushes the extrusion block 511 to compress the second spring 57, so that the movable plate 54 rotates and drives the locking rod 55 to separate from the sleeve 52. When the pipeline body 1 is installed, the second hydraulic cylinder 51 is reset, and the second spring 57 pushes the locking rod 55 to reposition the pipeline body 1;

[0051] 4) Buffering and shock absorption: when the second ring body 6 is connected to the drill bit, the third spring 73 of the buffer member 7 provides buffering to absorb shock and vibration.

[0052] The use method and working principle of this device: the control rod 33 can be pushed to move by the drive of the first hydraulic cylinder 32, so that the control rod 33 will slide inside the arc hole 211, and thus, the two protrusions 251 will be driven to move together, and the protrusions 251 will transmit the force from the control rod 33 to the rotating frame 25, so that the rotating frame 25 will start to rotate, and as the rotating frame 25 rotates, the three first movable sleeves 27 will be driven to move together at the same time, and as the first movable sleeves 27 move with the rotating frame 25, the transmission rod 26 will be driven to move, so that when the transmission rod 26 moves, it will rotate with the support block 28 as the center, and as the three transmission rods 26 move synchronously, the three extrusion wheels 29 will lock the pipeline body 1, thereby completing the positioning of the pipeline body 1 so as to play a supporting role when pulling back.

[0053] During the back-pulling process, the fixed ring 23 can play a protective role. When the ball 232 encounters a collision during the back-pulling, it will drive the movable rod 234 to move together, thereby cooperating with the first spring 24 to play a buffering role. When encountering a collision, the ball 232 will collide first, thereby playing a buffering and protective role.

[0054] The push of the second hydraulic cylinder 51 can drive the extrusion block 511 to move, so that the extrusion block 511 will apply a force to the movable plate 54 during this process. After the movable plate 54 is squeezed, it will begin to compress the second spring 57. During this process, the movable plate 54 will rotate around the center rod 541, and the movable plate 54 will use the control block 56 at one end to drive the locking rod 55 to move, so that one end of the locking rod 55 leaves the inner cavity of the sleeve 52. After the pipeline body 1 is installed inside the sleeve 52, the second hydraulic cylinder 51 can be controlled to drive the extrusion block 511 to reset. At this time, the elasticity of the second spring 57 will push the movable plate 54 in the opposite direction to swing. As the movable plate 54 swings, the control block 56 will be used to control one end of the locking rod 55 to gradually move to the inside of the sleeve 52, so that the pipeline body 1 can be squeezed and positioned by one end of the locking rod 55, thereby facilitating further locking of the pipeline body 1.

[0055] When the second ring body 6 is connected to the drill bit, the buffer member 7 can play an auxiliary buffering role. When encountering impact or vibration, the third spring 73 between the two fixed blocks 71 will begin to expand and contract, thereby facilitating the squeezing of the damper 72. In this process, since the damper 72 is compressed, it will accumulate energy, and cooperate with the damping force provided by the third spring 73 to play a buffering role, and the movable block 74 can move freely inside the fixed block 71, so that the four buffer members 7 can play a buffering role, which can cope with impact and vibration at various angles.

[0056] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A pipeline protection device for the pull-back stage of directional drilling construction, comprising a pipeline body (1), a first ring body (4) is installed on the outer surface of one end of the pipeline body (1), a second ring body (6) is arranged on one side of the first ring body (4), and a plurality of buffer members (7) are installed between the first ring body (4) and the second ring body (6), characterized in that: Two protection mechanisms (2) are symmetrically arranged on the top of the pipeline body (1), a driving mechanism (3) is installed between the two protection mechanisms (2), and a connecting mechanism (5) is installed on one side of the first ring body (4); The protection mechanism (2) comprises a support frame (21), one side of the support frame (21) is rotatably connected to a rotating frame (25), the inner side of the rotating frame (25) is rotatably connected to three first movable sleeves (27), the inner side of the first movable sleeve (27) is slidably connected to a transmission rod (26), one end of the transmission rod (26) is rotatably connected to a support block (28), and the inner side of the other end of the transmission rod (26) is rotatably connected to an extrusion wheel (29), the top of the support frame (21) is provided with an arc hole (211), and the top of the rotating frame (25) is fixedly connected to a protrusion (251); The driving mechanism (3) comprises a connecting rod (31) and a control rod (33), the outer surfaces of both ends of the connecting rod (31) are slidably connected to a second movable sleeve (34), and the outer surface of the connecting rod (31) is rotatably connected to a first hydraulic cylinder (32), one end of the first hydraulic cylinder (32) is rotatably connected to the control rod (33), the control rod (33) passes through the arc hole (211), and the control rod (33) is plugged into a protrusion (251), nuts (35) are provided on both sides of the protrusion (251), and the arc hole (211) is slidably connected to the control rod (33).

2. A pipeline protection device for the pull-back phase of directional drilling construction according to claim 1, characterized in that: One end of the second movable sleeve (34) is fixedly connected to the side wall of the support frame (21); a caster (22) is rotatably connected to the bottom of the support frame (21); and the support block (28) is fixedly connected to the side wall of the support frame (21).

3. According to claim 1, a pipeline protection device for the pull-back phase of directional drilling construction is characterized in that: A fixing ring (23) is fixedly connected to the outer edge of one side of the support frame (21), a plurality of grooves (231) are arranged on the outer side of the fixing ring (23), and a sphere (232) is arranged inside the groove (231).

4. A pipeline protection device for the pull-back phase of directional drilling construction according to claim 3, characterized in that: A movable rod (234) is fixedly connected to the bottom of the sphere (232), the bottom end of the movable rod (234) passes through the fixed ring (23), and a baffle (233) is fixedly connected to the bottom end of the movable rod (234), and a plurality of first springs (24) are arranged inside the fixed ring (23), and the first springs (24) are sleeved on the outer surface of the movable rod (234).

5. A pipeline protection device for the pull-back phase of directional drilling construction according to claim 4, characterized in that: The connecting mechanism (5) comprises a sleeve (52), both sides of the sleeve (52) are fixedly connected to a connecting frame (53), one side of the connecting frame (53) is provided with a second hydraulic cylinder (51), the second hydraulic cylinder (51) is fixedly mounted on the surface of the first ring body (4), and one end of the second hydraulic cylinder (51) is fixedly connected to an extrusion block (511).

6. A pipeline protection device for the pull-back phase of directional drilling construction according to claim 5, characterized in that: The inner side of the sleeve (52) is fixedly connected to a center rod (541), the surface of the center rod (541) is rotatably connected to a movable plate (54), and one end of the movable plate (54) is fixedly connected to a control block (56).

7. A pipeline protection device for the pull-back phase of directional drilling construction according to claim 6, characterized in that: A locking rod (55) is inserted into one side of the sleeve (52), one end of the locking rod (55) is inserted into the control block (56), and one end of the locking rod (55) extends to the inner side of the sleeve (52).

8. The pipeline protection device for the pull-back phase of directional drilling construction according to claim 7 is characterized by: The outer surface of the sleeve (52) is provided with a mounting groove (58), a second spring (57) is installed inside the mounting groove (58), and one end of the second spring (57) abuts against the movable plate (54).

9. The pipeline protection device for the pull-back phase of directional drilling construction according to claim 1 is characterized by: The buffer component (7) comprises a damper (72), both ends of the damper (72) are fixedly connected with movable blocks (74), a third spring (73) is arranged between the two movable blocks (74), and the third spring (73) is sleeved on the outer surface of the damper (72), and one end of the two movable blocks (74) is movably connected with a fixed block (71), one of the fixed blocks (71) is fixedly connected to the second ring body (6), and the other fixed block (71) is fixedly connected to the first ring body (4).

10. A method for using a pipeline protection device in the pull-back stage of directional drilling construction, characterized in that: A pipeline protection device for the pull-back phase of directional drilling construction using any one of claims 1 to 9 includes the following steps: S1, the control rod (33) drives the rotating frame (25) to move, the first hydraulic cylinder (32) drives the control rod (33) to move, drives the two protrusions (251) to transmit force to the rotating frame (25), the rotating frame (25) rotates and drives the three first movable sleeves (27) to move, and as the first movable sleeves (27) move, the transmission rod (26) rotates and locks the pipeline body (1); S2, fixed ring (23) protection and collision buffering, during the back-pulling process, the fixed ring (23) protects the system, and when the ball (232) encounters a collision, it drives the movable rod (234) to cooperate with the first spring (24) to buffer the impact force; S3, the second hydraulic cylinder (51) pushes the extrusion block (511) to position with the pipeline, and the second hydraulic cylinder (51) pushes the extrusion block (511) to compress the second spring (57), so that the movable plate (54) rotates and drives the locking rod (55) to separate from the sleeve (52). When the pipeline body (1) is installed, the second hydraulic cylinder (51) is reset, and the second spring (57) pushes the locking rod (55) to reposition the pipeline body (1); S4, buffering and shock absorption: when the second ring body (6) is connected to the drill bit, the third spring (73) of the buffer member (7) provides buffering to absorb shock and vibration.

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